How to Use SJ1-355XNG Audio Jack: Examples, Pinouts, and Specs

The SJ1-355XNG is a 3.5mm audio jack manufactured by Same Sky. It is a versatile and widely used component for audio signal transmission, commonly found in headphones, speakers, and other audio devices. This jack supports stereo sound, making it ideal for applications requiring high-quality audio output. Its compact design and robust construction make it suitable for both consumer electronics and professional audio equipment.

• Headphones and earphones
• Portable speakers
• Audio amplifiers
• Media players and smartphones
• DIY audio projects
• Embedded systems requiring audio output

The SJ1-355XNG audio jack is designed to meet the needs of modern audio systems. Below are its key technical details:

• Manufacturer: Same Sky
• Connector Type: 3.5mm stereo audio jack
• Number of Contacts: 3 (Tip, Ring, Sleeve - TRS configuration)
• Mounting Style: Through-hole
• Rated Voltage: 12V DC
• Rated Current: 1A
• Contact Resistance: ≤ 30 mΩ
• Insulation Resistance: ≥ 100 MΩ
• Operating Temperature Range: -25°C to +85°C
• Durability: 5000 mating cycles

The SJ1-355XNG has three main pins corresponding to the TRS (Tip, Ring, Sleeve) configuration. Below is the pinout description:

The SJ1-355XNG audio jack is straightforward to use in audio circuits. Follow the steps below to integrate it into your project:

1. Identify the Pins: Locate the Tip, Ring, and Sleeve pins on the audio jack. Refer to the pin configuration table above.
2. Soldering: Secure the audio jack onto a PCB using its through-hole pins. Ensure proper soldering to avoid loose connections.
3. Connect to Audio Source:
   • Connect the Tip pin to the left audio channel output of your audio source.
   • Connect the Ring pin to the right audio channel output.
   • Connect the Sleeve pin to the ground of your circuit.
4. Test the Connection: Plug in a compatible 3.5mm audio plug and test the audio output to ensure proper functionality.

• Avoid Overloading: Do not exceed the rated voltage (12V DC) or current (1A) to prevent damage.
• Proper Grounding: Ensure the Sleeve pin is connected to the circuit ground to avoid noise or interference.
• Durability: While the jack is rated for 5000 mating cycles, handle it with care to maximize its lifespan.
• PCB Design: When designing a PCB, ensure the mounting holes align with the jack's dimensions for a secure fit.

The SJ1-355XNG can be used with an Arduino UNO for audio output. Below is an example of how to connect it to a simple audio circuit:

• The Tip and Ring pins are connected to two PWM output pins of the Arduino (e.g., pins 9 and 10).
• The Sleeve pin is connected to the Arduino's GND.

/*
  Example: Generating simple audio tones using SJ1-355XNG audio jack
  - Pin 9: Left audio channel (Tip)
  - Pin 10: Right audio channel (Ring)
  - GND: Sleeve (common ground)
*/

int leftChannel = 9;  // PWM pin for left audio channel
int rightChannel = 10; // PWM pin for right audio channel

void setup() {
  pinMode(leftChannel, OUTPUT);  // Set left channel as output
  pinMode(rightChannel, OUTPUT); // Set right channel as output
}

void loop() {
  // Generate a tone on the left channel
  analogWrite(leftChannel, 128); // 50% duty cycle (mid-level tone)
  delay(500); // Wait for 500ms

  // Generate a tone on the right channel
  analogWrite(rightChannel, 128); // 50% duty cycle (mid-level tone)
  delay(500); // Wait for 500ms

  // Turn off both channels
  analogWrite(leftChannel, 0);
  analogWrite(rightChannel, 0);
  delay(500); // Wait for 500ms
}

1. No Audio Output

   • Cause: Incorrect pin connections.
   • Solution: Verify that the Tip, Ring, and Sleeve pins are connected to the correct audio source outputs and ground.

2. Distorted Sound

   • Cause: Poor soldering or loose connections.
   • Solution: Inspect the solder joints and ensure all connections are secure.

3. Noise or Interference

   • Cause: Improper grounding or external interference.
   • Solution: Ensure the Sleeve pin is properly grounded and use shielded cables if necessary.

4. Jack Not Fitting Properly

   • Cause: Mismatched plug size or damaged jack.
   • Solution: Use a standard 3.5mm plug and inspect the jack for physical damage.

• Q: Can the SJ1-355XNG handle mono audio signals?
  A: Yes, it can handle mono signals by connecting the Tip and Ring pins together to the single audio channel.

• Q: Is the SJ1-355XNG compatible with TRRS (Tip-Ring-Ring-Sleeve) plugs?
  A: No, the SJ1-355XNG is designed for TRS (Tip-Ring-Sleeve) plugs and may not work correctly with TRRS plugs.

• Q: Can I use this jack for microphone input?
  A: The SJ1-355XNG is primarily designed for audio output. For microphone input, consider using a jack specifically designed for that purpose.

By following this documentation, you can effectively integrate the SJ1-355XNG audio jack into your projects and troubleshoot any issues that arise.